Typewriter carriage and bearing therefor



Nov. 11, 1952 G. PREZIOSO TYPEWRITER CARRIAGE AND BEARING THEREFOR I 2SHEETS-SHEET 1 Filed June 8, 1949 INVENTOR Giuseppe Prezc'oso.

ATTORNEY Nov. 11, 1952 e. PREZIOSO TYPEWRITER CARRIAGE AND BEARINGTHEREFOR 2 SHEETS-SHEET 2 Filed June 8, 1949 INVENTOR GiuseppePrezp'oso.

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ATTORNE Y Patented Nov. 11, 1952 TYPEWRITER CARRIAGE AND BEARINGTHEREFOR Giuseppe Prezioso, Yverdon, Switzerland, as signor to PaillardS. A., Sainte-Croix, Vaud, Switzerland, a corporation of SwitzerlandApplication June 8, 1949, Serial No. 97,819 In Switzerland June 25, 19483 Claims.

In known constructions of typewriters, the carriage rolls on two rollingrails generally arranged in a plane which is horizontal or is inclinedrelatively to the base of the machine. In all these constructions, theball bearings located on the rails, not only have to support the weightof the carriage, but also the forces due to the fact that the latter isnot balanced relatively to the rails. On the other hand, in the majorityof known constructions, at least one of the rails is located behind theplaten of the carriage, which renders difficult the mounting andaccessibility of the members carried by the framework of the typewriterand which control the movements of the carriage.

The present invention has for its object, amongst other things, toremedy these disadvantages by a particular arrangement of the rollingrails for the carriage. Accordin to the invention these are locatedunderneath the platen in a vertical plane passing substantially throughthe centre of gravity of the carriage.

One form of construction of the subject of the invention is shown by wayof example in the accompanying drawing, wherein:

Fi 1 is a view showing diagrammatically the arrangement of the carriageon the machine.

Fig. 2 is a diagrammatic view in perspective, to a larger scale, withparts in section.

Fig. 3 is a cross section of the carriage.

With reference to the drawing, it will be seen in Figs. 1 and 3, thatthe carriage I is mounted on two rolling rails 2, located underneath theplaten 3, in a vertical plane passing substantially through the centreof gravity of the carriage.

The rolling rails 2 are secured to thebody 4 of the carriage located ina vertical plane and which is formed by a single part. The rails 2 aredisposed one above the other so as to form a recess adapted toco-operate with a rail 5 secured to the front vertical edges of theupwardly opening slots 6a of the framework 6 of the typewriter. Betweenthe rail 5 and the rails 2 are located rolling balls I.

The arrangement is such that the vertical plane passing through thecentre of the balls I passes substantially through the centre of gravityof the carriage I, that is to say the weight formed on the one hand bythe platen 3 and the memhere for feeding the paper, and the leveractuating the carriage is substantially equal to that formed, on theother hand, by the body 4 of the carriage and the members located on itsrear portion such as margin stops 9 and tabulator members I0. andconsequently substantially balance one another.

As a result the forces acting on the rails 2 are substantially limitedto the weight of the carriage which is supported by the upper rollingtrack, the lower rolling track serving only as a guide.

As will be seen in Fig. 2, the plates ll forming the ends-of thecarriage and which serve to support the platen and the other members ofthe carriage are formed by sheet metal parts, secured on edge, forexample by screws, to the body 4. The upper portion of the latter isbeveled and serves as a support for a guide 12 for the introduction ofthe sheet.

As will be seen in Fig. 1, the construction above described enables thecovering of the carriage to be attached in a harmonious manner to therear part of the typewriter. Further it will be seen that the carriagemay be actuated absolutely freely by the user without his hand meetingany obstacle whatsoever.

I claim:

1. A typewriter carriage including a platen, comprising, a verticallydisposed body having in one of its longitudinal sides a horizontallyextending recess for receiving a rail affixed to the framework of themachine, said body having a supporting top surface rearwardly of theplaten, a sheet feeding guide supported by the top surface rearwardly ofthe platen and a platen supporting plate at each longitudinal end of thebody.

2. The carriage according to claim 1 and wherein the top surface of thebody is an inclined plane supporting the sheet feeding guide, and thelongitudinal ends of the body carrying the platen supporting plates areplane surfaces perpendicular to the vertical plane of the body.

3. In a typewriter, a pair of side frames each having upwardly openingslots, a rail having forwardly extending portions secured to the frameat the front vertical edges of said slots. 2. carriage body comprising avertical portion having spaced guides on its front side cooperating withthe rail to slidably mount the carriage, said portion having an upwardlyand rearwardly inclined supporting face, platen supporting plates at theends of said vertical portion of the body and extending forwardly andrearwardly thereof, a platen mounted in said plates, and a sheet feedingplate extending between said plates and resting on the said inclinedsupporting face of the vertical portion of the body to be disposedtangentially to the lower peripheral portion of the platen.

GIUSEPPE PREZIOSO.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,163,966 Anderson Dec. 14, 19151,302,621 Yaw May 6, 1919 1,723,668 Trew Aug. 6, 1929

